LC engineering makes a turbo kit for the 22RE. (LC kicks ass! When it comes to 22RE parts) I've seen people sqweez IC behind the front grill. I think behind the skid plate might be a good place...
LC's Turbo Kit
I have .20 over pistons, over sized valves, springs, a torquie cam, LC's header and a K&N drop in on my 4x4 22RE. Its not fast, but its fun...
Just an FYI the 7MGE (N/A Supra motor) will bolt up to the M/T W56 bell housing (7MGTE needs a custom one made)